MIL-DTL-23659F
APPENDIX A
intended test current shall not apply to the 1 minute of test time. Assessment of damage or no-
damage at each test level shall be made by the application of operational voltage from the
intended-use fireset. If the operational voltage is unknown or undefined, the MAFV determined
in the firing properties test shall be used on the test fireset. An output that meets the ILI
specified output criteria shall be considered evidence of no damage while failure to do so shall be
assessed as a damaged result. Results shall be analyzed statistically and the mean and standard
deviation of the no damage current shall be reported.
A.6.4. Thermal Cook-Off. The ILI will be placed in a fixture that provides radial
confinement and an output measurement arrangement identical to those used for output
determination in A.6.2. The radial confinement used shall be a right circular cylinder
constructed from steel. The outside of the cylinder shall have a radius that is at least 50% larger
than the radius of the ILI being tested. Additionally the cylinder shall have a center hole to
accommodate the ILI whose radius is sized such that there is a maximum radial gap of 0.0018
inch between the outside surface of the ILI and the inside surface of the hole. The radially
confined ILI shall be mechanically anchored to prevent movement should a reaction occur. If
the ILI is threaded then the confinement cylinder shall be likewise threaded to accommodate
the ILI. These assemblies shall be placed in an oven at ambient temperatures and the
temperature increased at a rate of 3.3 C (6°F) per hour until all ILI react. If the reaction of the
ILI is not easily detectable, the test may be terminated at a temperature 10 C (18°F) above the
decomposition temperature of the most thermally stable energetic material used in the ILI. In
order to reduce test time, a starting temperature in excess of ambient is allowed as long as the
time interval between the start of the test to ILI reaction is a minimum of 16 hours.
Documentation shall include the temperature and time at which the cook-off reaction occurs; as
well as, any output produced by the cook-off reaction.
A.6.5. Temperature-Shock/Humidity. Temperature-shock/Humidity cycling between a
maximum cold temperature of -54 C and minimum hot temperature of +71 C (-65°F to and
+160°F respectively) in accordance with MIL-STD-331, test C1.
A.6.6. Leakage.
A.6.6.1. Hermetic Devices. Perform the Fine Leak Test in accordance with MIL-STD-331,
test C8.
A.6.6.2. Non Hermetic Devices. Perform Leak Test in accordance with Safety Authority's
requirements.
A.6.7. Electrical Cook-Off. The ILI shall be subjected to the following AC and a DC
electrical cook-off tests.
A.6.7.1. AC Test. The input to the ILI shall be energized from a 50 to 60 hertz AC source
at a minimum of 440 VAC (RMS); the power source including all cabling must be capable of
sustaining a minimum short circuit current of 20 amperes to the ILI. The minimum open circuit
voltage of the source shall be adjusted to within -5 to +15 percent of the required value. ILI
used for this test shall be tested at +23 C ± 10 C (+73 ± 18°F). Five ILI shall be exposed to the
440 volts RMS for five minutes without additional output impedance. When testing a single
component, each ILI shall be confined with radial confinement and arranged for output
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